Internal Webcam being recognized diffferently and not working anymore

kj · 2024-12-20 10:03:15

Webcam Not Working: Recognized Differently, Previously Functioned Properly

Issue Summary:
My built-in webcam has suddenly stopped functioning. Previously, it worked perfectly and was recognized as an "HP HD Camera" with its indicator light turning on during use. However, it's now being recognized as a completely different device, and applications like Kamoso show a blank screen instead of video output. The camera's indicator light no longer turns on.

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Observations:
1. Device Recognition:
The camera was previously recognized as:
HP HD Camera (30c9:000f)
Now, it's being recognized as:
SPCA2650 PC Camera (1bcf:0b12)
This change happened without any deliberate modifications to my system.

2. Kamoso Behavior:
The application doesn't detect the webcam properly. It only shows a blank screen.

3. Indicator Light:
The camera's indicator light no longer activates when attempting to use the webcam.

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Diagnostic Outputs:

1. `lsusb` Output:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 1bcf:0b12 Sunplus Innovation Technology Inc. SPCA2650 PC Camera
Bus 003 Device 003: ID 046d:c52f Logitech, Inc. Nano Receiver
Bus 003 Device 004: ID 258a:002a SINO WEALTH Gaming KB
Bus 003 Device 005: ID 04f3:0c5e Elan Microelectronics Corp. ELAN:ARM-M4
Bus 003 Device 006: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

2. `v4l2-ctl --list-devices` Output:
SPCA2650 PC Camera: PC Camera (usb-0000:00:14.0-1):
/dev/video0
/dev/video1
/dev/media0

3. `lsmod | grep uvcvideo` Output:
uvcvideo 180224 2
videobuf2_vmalloc 20480 18 uvcvideo
uvc 12288 1 uvcvideo
videobuf2_v4l2 40960 1 uvcvideo
videobuf2_common 94208 4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
videodev 393216 3 videobuf2_v4l2,uvcvideo
mc 90112 5 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common

4. Logs from Previous Month:
Nov 09 14:46:47 celestia kernel: usb 3-1: Product: HP HD Camera
Nov 09 14:46:48 celestia kernel: usb 3-1: Found UVC 1.50 device HP HD Camera (30c9:000f)
Nov 09 14:46:48 celestia kernel: usb 3-1: Found UVC 1.50 device HP HD Camera (30c9:000f)

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Troubleshooting Steps Taken:
1. Reboot

2. Tried Alternative Applications:
Tested with Cheese and other webcam tools. Results were consistent—no output or recognition of the original camera.

3. Checked dmesg for USB Errors:
Observed no critical USB-related errors in the logs.

4. Kernel Updates:
Verified my system is up-to-date. Running the latest kernel, but the issue persists.

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System Information:
- Kernel Version: 6.12.4-arch1-1
- Desktop Environment: KDE

gromit · 2024-12-20 20:27:35

Does it work when you downgrade 6.11?

sudo pacman -U https://archive.archlinux.org/packages/l/linux/linux-6.11.arch1-1-x86_64.pkg.tar.zst

Alternatively, does it work when you go to "linux-lts"?

seth · 2024-12-20 22:59:00

x-ref, https://bbs.archlinux.org/viewtopic.php … 6#p2215676
Though the symptoms are rather different.

@kj, please use [code][/code] tags. Edit your post in this regard.
If the proper camera shows up w/ the LTS or 6.11 kernel, check whether it also shows up w/ three devices there.
Have you btw. tried to access video1 or media0 ?
https://wiki.archlinux.org/title/Webcam … ity_Webcam (ignore the specific vendor mentioned)

Since it shows up as completely different device, the key is perhaps one of the wmi modules?

Arch Linux

#1 2024-12-20 10:03:15

Internal Webcam being recognized diffferently and not working anymore

#2 2024-12-20 20:27:35

Re: Internal Webcam being recognized diffferently and not working anymore

#3 2024-12-20 22:59:00

Re: Internal Webcam being recognized diffferently and not working anymore

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